Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
GitHub Visualizer - Enter user/repo and see the project visually
Gitslash - Autopopulate your Github Activity Chart
GHuser - Better GitHub profiles for everyone
Gitscout - A beautiful Github Issues experience for macOS
Octohunt - Search to find developers in your city on Github.